Measurement and correlation of the physical properties of aqueous solutions of ammonium based ionic liquids

Kartikawati, Nur Ani; Safdar, Rizwan; Lal, Bhajan; Mutalib, Muhammad Ibrahim Bin Abdul; Shariff, Azmi Mohd

doi:10.1016/j.molliq.2018.01.040

Cited by 23 publications

(6 citation statements)

References 29 publications

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“…Often, the rate of gas dissolution as a result of mass transfer depends on the surface tension of the liquid phase [ 49 , 50 , 51 ]. The surface tension of QAHs decreases with increasing alkyl chain, according to Kartikawati et al [ 52 ], which inhibits the rate of gas dissolution to form more hydrates. This better kinetic inhibition impact occurs because of the increasing free energy at the gas-liquid interfaces in the presence of QAHs with longer chain lengths.…”

Section: Resultsmentioning

confidence: 99%

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Kinetic Behavior of Quaternary Ammonium Hydroxides in Mixed Methane and Carbon Dioxide Hydrates

et al. 2021

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This study evaluates the kinetic hydrate inhibition (KHI) performance of four quaternary ammonium hydroxides (QAH) on mixed CH4 + CO2 hydrate systems. The studied QAHs are; tetraethylammonium hydroxide (TEAOH), tetrabutylammonium hydroxide (TBAOH), tetramethylammonium hydroxide (TMAOH), and tetrapropylammonium hydroxide (TPrAOH). The test was performed in a high-pressure hydrate reactor at temperatures of 274.0 K and 277.0 K, and a concentration of 1 wt.% using the isochoric cooling method. The kinetics results suggest that all the QAHs potentially delayed mixed CH4 + CO2 hydrates formation due to their steric hindrance abilities. The presence of QAHs reduced hydrate formation risk than the conventional hydrate inhibitor, PVP, at higher subcooling conditions. The findings indicate that increasing QAHs alkyl chain lengths increase their kinetic hydrate inhibition efficacies due to better surface adsorption abilities. QAHs with longer chain lengths have lesser amounts of solute particles to prevent hydrate formation. The outcomes of this study contribute significantly to current efforts to control gas hydrate formation in offshore petroleum pipelines.

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Section: Resultsmentioning

confidence: 99%

“…This better kinetic inhibition impact occurs because of the increasing free energy at the gas-liquid interfaces in the presence of QAHs with longer chain lengths. In the case of TBAOH [ 52 ], there is an increase in the surface adsorption to the hydrate nucleus crystals, which aids in providing a better inhibition effect.…”

Section: Resultsmentioning

confidence: 99%

Kinetic Behavior of Quaternary Ammonium Hydroxides in Mixed Methane and Carbon Dioxide Hydrates

et al. 2021

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“…Dynamic viscosities of smoke (gas) gaseous components were calculated at 37 • C. Knowing the dynamic viscosities of smoke (gas) components, dynamic viscosity of the smoke (gas) mixture was calculated [19][20][21][22]. The diameter of particulate matter that was removed at 50% efficiency (d 50 ) from 37 • C smoke (gas) was established.…”

Section: Methodology Of Theoretical Evaluation Of the Impact Of Smoke...mentioning

confidence: 99%

Experimental Research of Gaseous Emissions Impact on the Performance of New-Design Cylindrical Multi-Channel Cyclone with Adjustable Half-Rings

et al. 2022

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Cyclones are widely used for separating particles from gas in energy production objects. The efficiency of conventional centrifugal air cleaning devices ranges from 85 to 90%, but the weakness of many cyclones is the low collection efficiency of particles less than 10 μm in diameter. The novelty of this work is the research of the channel-type treatment device, with few levels adapted for precipitation of fine particulate matter, acting by a centrifugal and filtration principle. Many factors have an impact on cyclone efficiency—humidity, temperature, gas (air) composition, airflow velocity and etc. Many scientists evaluated only the effect of origin and size of PM on cyclone efficiency. The effect of gas (air) composition and temperature, and humidity on the multi-channel cyclone-separator efficiency still demands contributions. Complex theoretical and experimental research on air flow parameters and the efficiency of a cylindrical eight-channel system with adjustable half-rings for removing fine-dispersive particles (<20 μm) was carried out. The impact of air humidity and temperature on air flow, and gaseous smoke components on the removal of wood ashes was analyzed. The dusty gas flow was regulated. During the experiment, the average velocity of the cyclone was 16 m/s, and the temperature was 20–50 °C. The current paper presents experimental research results of wood ash removal in an eight-channel cyclone and theoretical methodology for the calculation of airflow parameters and cyclone effectiveness.

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“…The IL viscosity is mainly determined by the Van der Waals force and the hydrogen bonding force, as it is more influenced by the anion and cation structure of the [MEA][GLY]. The experimental viscosity of the IL and its aqueous solution have been correlated as a function of temperature (303.15–323.15 K) and composition in two ranges of low (5–20 wt%) and high (25–100 wt%) concentrations, using the following equation 31 :

η goodbreak= c_{1} goodbreak+ c_{2} x_{1} goodbreak+ c_{3} T goodbreak+ c_{4} {x_{1}}^{2} goodbreak+ c_{5} x_{1} T

where η , T , and x 1 represent the dynamic viscosity, Pa s, absolute temperature, K, and the mole fraction of [MEA][GLY], respectively. c 1 , c 2 , c 3 , c 4 , and c 5 indicate the corresponding fitting parameters, achieved by fitting in the empirical data of viscosity.…”

Section: Methodology and Data Correlationmentioning

confidence: 99%

On the prediction of thermo‐physicochemical properties and equilibrium absorption of CO ₂ into aqueous protic monoethanolamine glycinate ionic liquid

Hasanizadeh

Valeh-e-Sheyda

2021

Environ Prog Sustainable Energy

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The utilization of pure ionic liquids (ILs), as environmentally green and soft chemical solvents, is restricted in the CO2 capture industry due to their high viscosity and fair conductivity. In this paper, the novel comprehensive models were developed for accurate estimation of density, dynamic viscosity, surface tension, and electrical conductivity of a novel protic amino acid‐functionalized IL, namely monoethanolamine glycinate, [MEA][GLY], in the temperature range of 303.15–323.15 K at two different intervals of water content (5–20 wt%, and 25–100 wt%). The results of the suggested models revealed that the density, viscosity, and surface tension of [MEA][GLY] decline substantially with rising temperature, while the electrical conductivity presents an adverse trend. Additionally, the impact of varying the concentration on the density and viscosity of the IL solution is more significant than the solution temperature, particularly at high concentrations of the IL. Moreover, a second‐order polynomial equation was suggested to depict the equilibrium pressure dependence of CO2 loading capacity of aqueous [MEA][GLY] in IL, at various equilibrium pressures of 1–7 bar.

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Measurement and correlation of the physical properties of aqueous solutions of ammonium based ionic liquids

Cited by 23 publications

References 29 publications

Kinetic Behavior of Quaternary Ammonium Hydroxides in Mixed Methane and Carbon Dioxide Hydrates

Kinetic Behavior of Quaternary Ammonium Hydroxides in Mixed Methane and Carbon Dioxide Hydrates

Experimental Research of Gaseous Emissions Impact on the Performance of New-Design Cylindrical Multi-Channel Cyclone with Adjustable Half-Rings

On the prediction of thermo‐physicochemical properties and equilibrium absorption of CO ₂ into aqueous protic monoethanolamine glycinate ionic liquid

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Measurement and correlation of the physical properties of aqueous solutions of ammonium based ionic liquids

Cited by 23 publications

References 29 publications

Kinetic Behavior of Quaternary Ammonium Hydroxides in Mixed Methane and Carbon Dioxide Hydrates

Kinetic Behavior of Quaternary Ammonium Hydroxides in Mixed Methane and Carbon Dioxide Hydrates

Experimental Research of Gaseous Emissions Impact on the Performance of New-Design Cylindrical Multi-Channel Cyclone with Adjustable Half-Rings

On the prediction of thermo‐physicochemical properties and equilibrium absorption of CO 2 into aqueous protic monoethanolamine glycinate ionic liquid

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On the prediction of thermo‐physicochemical properties and equilibrium absorption of CO ₂ into aqueous protic monoethanolamine glycinate ionic liquid